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MAX17497BATE+ PDF预览

MAX17497BATE+

更新时间: 2024-11-14 12:23:39
品牌 Logo 应用领域
美信 - MAXIM 转换器稳压器
页数 文件大小 规格书
30页 3936K
描述
AC-DC and DC-DC Peak-Current-Mode Converters with Integrated Step-Down Regulator

MAX17497BATE+ 技术参数

是否无铅: 不含铅是否Rohs认证: 符合
生命周期:Active零件包装代码:QFN
包装说明:HVQCCN, LCC16,.12SQ,20针数:16
Reach Compliance Code:compliantECCN代码:EAR99
HTS代码:8542.31.00.01Factory Lead Time:6 weeks
风险等级:2.33其他特性:5 VOLT OUTPUT ALSO AVAILABLE
模拟集成电路 - 其他类型:SWITCHING REGULATOR控制模式:CURRENT-MODE
控制技术:PULSE WIDTH MODULATION最大输入电压:36 V
最小输入电压:4.5 V标称输入电压:15 V
JESD-30 代码:S-XQCC-N16长度:3 mm
湿度敏感等级:1功能数量:1
端子数量:16最高工作温度:125 °C
最低工作温度:-40 °C最大输出电流:2.6 A
标称输出电压:3.3 V封装主体材料:UNSPECIFIED
封装代码:HVQCCN封装等效代码:LCC16,.12SQ,20
封装形状:SQUARE封装形式:CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE
峰值回流温度(摄氏度):NOT SPECIFIED认证状态:Not Qualified
座面最大高度:0.8 mm子类别:Switching Regulator or Controllers
表面贴装:YES切换器配置:BUCK
最大切换频率:1060 kHz温度等级:AUTOMOTIVE
端子形式:NO LEAD端子节距:0.5 mm
端子位置:QUAD处于峰值回流温度下的最长时间:NOT SPECIFIED
宽度:3 mmBase Number Matches:1

MAX17497BATE+ 数据手册

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19-5981; Rev 1; 1/12  
E V A L U A T I O N K I T A V A I L A B L E  
General Description  
Benefits and Features  
The MAX17497A/MAX17497B include both a current-  
mode fixed-frequency PWM converter and a synchro-  
nous step-down regulator. They contain all the control  
circuitry required to design wide-input-voltage noniso-  
lated power supplies to supply multiple output rails for  
smart meters, industrial control, and other similar applica-  
tions. The MAX17497A has its rising/falling undervoltage  
lockout (UVLO) thresholds optimized for universal offline  
(85V AC to 265V AC) applications, while the MAX17497B  
supports undervoltage lockout (UVLO) thresholds suit-  
able to low-voltage DC-DC applications. Both devices  
also include a 3.3V fixed-output synchronous step-down  
regulator that delivers up to 600mA load current.  
S Reduced Component Count and Board Space  
Flyback/Boost with Integrated Internally  
Compensated Step-Down Regulator  
No Current-Sense Resistor  
Space-Saving 16-Pin (3mm x 3mm) TQFN  
Package  
S Minimal Radio Interference  
250kHz Switching in Offline Version  
Minimizes Interference with Radio Receivers  
in Smart Meter Applications  
S Reduced Inrush Current  
Programmable Flyback/Boost Soft-Start  
Internal Digital Soft-Start for Step-Down  
The switching frequency of the MAX17497A flyback  
converter is 250kHz, while the MAX17497B flyback/  
boost converter is 500kHz. The internally compensated  
synchronous step-down regulator switches at 1MHz on  
both versions. These frequencies allow the use of tiny  
magnetic and filter components resulting in compact,  
cost-effective power supplies. An EN/UVLO input allows  
the user to start the power supply precisely at the desired  
input voltage, while also functioning as an on/off pin. The  
OVI pin enables implementation of an input overvoltage-  
protection scheme that ensures the converter shuts  
down when the DC input voltage exceeds the desired  
maximum value.  
Regulator  
S Reduced Power Dissipation Under Fault  
Hiccup Mode Overcurrent Protection  
Thermal Shutdown with Hysteresis  
S Robust Protection Features  
Flyback/Boost Programmable Current Limit  
Input Overvoltage Protection  
S Optimized Loop Performance  
Programmable Slope Compensation for  
Flyback/Boost Maximizes Obtainable Phase  
Margin  
S High Efficiency  
Programmable current limit allows proper sizing and  
protection of the primary switching FET. The MAX17497B  
supports a maximum duty cycle of 93% and provides  
programmable slope compensation to allow optimization  
of control loop performance. The MAX17497A supports  
a maximum duty cycle of 49%, and has a fixed internal  
slope compensation for optimum control loop perfor-  
mance. The devices provide an open-drain RESETN pin  
that serves as a power-good indicator and enters the  
high-impedance state to indicate that the flyback/boost  
converter and 3.3V step-down regulator outputs are in  
regulation. An SSF pin allows programmable soft-start  
time for the flyback/boost converter, while an internal  
digital soft-start is employed for the 3.3V step-down regu-  
lator to limit inrush current. Hiccup mode overcurrent pro-  
tection and thermal shutdown are provided to minimize  
dissipation under overcurrent and overtemperature fault  
conditions. The devices are available in a space-saving  
16-pin (3mm x 3mm) TQFN package with 0.5mm lead  
spacing.  
150mI, 65V-Rated nMOSFET Offers Typical  
Flyback Converter Efficiency Greater Than  
80%  
3.3V Step-Down Regulator Efficiency Greater  
Than 90%  
S Optional Spread Spectrum  
Applications  
AC-DC Power Supplies for Smart Meter  
Applications  
Universal-Input Offline AC-DC Power Supplies  
Wide-Range DC Input Flyback/Boost Industrial  
Power Supplies  
Ordering Information appears at end of data sheet.  
For related parts and recommended products to use with this part,  
refer to www.maxim-ic.com/MAX17497A.related.  
ꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀ Maxim Integrated Products  
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,  
or visit Maxim’s website at www.maxim-ic.com.  

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